Error when opening a previously created file

Hi,

i have this challenge. I have created a query, added some Excel calculations to it and saved the file. When I now try to open the file using BEx the VBA runs into this error. After this I cannot use use any of the BEX addin features or even connect to SAP.

Does anyboby know what might cause this and what can I do to fix it?

Sub ChangeCaption()

   If Not Application.ActiveWorkbook Is Nothing Then

       Call pAddin.ExcelInterface.ChangeCaption(Application.ActiveWorkbook.Name)

   End If

End Sub

Thanks!

- Jaakko